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| author | brooks <brooks@FreeBSD.org> | 2006-01-26 21:05:39 +0000 |
|---|---|---|
| committer | brooks <brooks@FreeBSD.org> | 2006-01-26 21:05:39 +0000 |
| commit | 7ba1cf1d5431763a5b0bcdca837d494731aefd4b (patch) | |
| tree | 9ef9e2766937467dbbd95e238c92d3036bfa3e13 /sbin/dhclient | |
| parent | 998c2ee892689a421b718d82f1773f89f0c0043e (diff) | |
| download | FreeBSD-src-7ba1cf1d5431763a5b0bcdca837d494731aefd4b.zip FreeBSD-src-7ba1cf1d5431763a5b0bcdca837d494731aefd4b.tar.gz | |
Fix rev 1.12.
/tmp may not be writeable yet when dhclient is first run via
/etc/rc.d/netif so using it may not work. Also, writing to a
predictable file in /tmp as root is a really bad idea since a malicious
user may be able to win a race and insert a symlink which will allow
them to cause any file to be overwritten. To solve these problems,
create the tempory file in /var/run which will exist this early and is
writable only by root.
Security: Local risk if users can cause dhclient to run on demand
(such as by unplugging and replugging the network cable).
Diffstat (limited to 'sbin/dhclient')
| -rw-r--r-- | sbin/dhclient/dhclient-script | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sbin/dhclient/dhclient-script b/sbin/dhclient/dhclient-script index da2a99b..ced527d 100644 --- a/sbin/dhclient/dhclient-script +++ b/sbin/dhclient/dhclient-script @@ -135,7 +135,7 @@ add_new_resolv_conf() { # thus broke the script. This code creates the resolv.conf if either # are provided. - local tmpres=${TMPDIR:-/tmp}/resolv.conf.std + local tmpres=/var/run/resolv.conf.${interface} rm -f $tmpres if [ -n "$new_domain_name" ]; then |
